http://www.collembola.org/key/cyphidae.htm
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Last updated on
2018.11.30
by Frans Janssens

This key is still under construction.
Note that missing figures will be provided as soon as possible.
Currently, the key is in the feasibility study phase to find
out how to integrate in the checklist in a modular way
a key that has been generated with
DELTA.

Rationale

Check the rationale for taxa used and not
used as well as subtaxonomic classification for some taxa.

Key

Note that no distinction between subtaxa and taxa
is made in the key.

1(0). Claw more or less globular (fig.1)............... Cyphoderodes
Claw never globular......................................... 2

Fig.1.

2(1). Head less than 2 times as long as distance from dorsum to tip
of buccal cone (fig.2b)................................... 3
Head more than 2 times as long as distance from dorsum to tip
of buccal cone (fig.2a)......................... Calobatinus

Fig.2.

3(2). Males with lateral projection on second antennal segment
(fig.3)...................................... Paracyphoderus
Males without lateral projection on second antennal segment. 4

9(8). Mucro long, with two or more dorsally projecting teeth
(fig.8a)...................................... Cephalophilus2
Mucro small and toothed (fig.8b), vestigial or absent.........
.......................................... Pseudocyphoderus

Fig.8.

10(8). Furca with setae between large scales on dorsum of dens
(fig.9b)................................................. 11
Furca without setae between large scales on dorsum of dens
(fig.9a)......................................... Serroderus

Fig.9.

11(10). Mucro gutter-like with two dorsal lamellae at least one
toothed (fig.10)................................. Troglobius
Mucro with a single dorsal lamella with or without dorsal
teeth............................................ Cyphoderus

3 Borecus Folsom 1923 has been sunk to synonymy with Cyphoderus by Mills, 1934.

Differential diagnoses

Borecus 3 Claw never globular. Dens dorsally with 2 rows of
large feathered setae (fig.4a). Head less than 2 times as long as distance
from dorsum to tip of buccal cone (fig.2b). Males without lateral projection
on second antennal segment.

Calobatinus Claw never globular. Head more than 2 times as long
as distance from dorsum to tip of buccal cone (fig.2a).

Cephalophilus 2 Claw never globular. Dens dorsally with
scales and normal setae (fig.4b). Head less than 2 times as long as distance
from dorsum to tip of buccal cone (fig.2b). Males without lateral projection
on second antennal segment. Mandibles present. Mouth cone projecting downward
(fig.7c&d). Mucro long, with two or more dorsally projecting teeth (fig.8a).
Unguis without filamentous projection on inner teeth. Unguis apical teeth at
most 3.

Cyphoderinus Claw never globular. Dens dorsally with scales and
normal setae (fig.4b). Head less than 2 times as long as distance from dorsum
to tip of buccal cone (fig.2b). Males without lateral projection on second
antennal segment. Mandibles vestigial.

Cyphoderodes Claw more or less globular (fig.1).

Cyphoderus Claw never globular. Dens dorsally with scales and
normal setae (fig.4b). Furca with setae between large scales on dorsum of dens
(fig.9b). Head less than 2 times as long as distance from dorsum to tip of
buccal cone (fig.2b). Males without lateral projection on second antennal
segment. Mandibles present. Mouth cone projecting forward (fig.7a&b). Mucro
with a single dorsal lamella with or without dorsal teeth. Unguis without
filamentous projection on inner teeth. Unguis apical teeth at most 3.

Delamarerus Claw never globular. Dens dorsally with scales and
normal setae (fig.4b). Head less than 2 times as long as distance from dorsum
to tip of buccal cone (fig.2b). Males without lateral projection on second
antennal segment. Mandibles present. Unguis apical teeth at least 5 (fig.5).

Megacyphoderus 1 Claw never globular. Dens dorsally with
scales and normal setae (fig.4b). Head less than 2 times as long as distance
from dorsum to tip of buccal cone (fig.2b). Males without lateral projection
on second antennal segment. Mandibles present. Unguis with a filamentous
projection on one or two inner teeth (fig.6). Unguis apical teeth at most 3.

Paracyphoderus Claw never globular. Head less than 2 times as
long as distance from dorsum to tip of buccal cone (fig.2b). Males with
lateral projection on second antennal segment (fig.3).

Pseudocyphoderus Claw never globular. Dens dorsally with scales
and normal setae (fig.4b). Head less than 2 times as long as distance from
dorsum to tip of buccal cone (fig.2b). Males without lateral projection on
second antennal segment. Mandibles present. Mouth cone projecting downward
(fig.7c&d). Mucro small and toothed (fig.8b), vestigial or absent. Unguis
without filamentous projection on inner teeth. Unguis apical teeth at most 3.

Serroderus Claw never globular. Dens dorsally with scales and
normal setae (fig.4b). Furca without setae between large scales on dorsum of
dens (fig.9a). Head less than 2 times as long as distance from dorsum to tip
of buccal cone (fig.2b). Males without lateral projection on second antennal
segment. Mandibles present. Mouth cone projecting forward (fig.7a&b). Unguis
without filamentous projection on inner teeth. Unguis apical teeth at most 3.

Troglobius Claw never globular. Dens dorsally with scales and
normal setae (fig.4b). Furca with setae between large scales on dorsum of dens
(fig.9b). Head less than 2 times as long as distance from dorsum to tip of
buccal cone (fig.2b). Males without lateral projection on second antennal
segment. Mandibles present. Mouth cone projecting forward (fig.7a&b). Mucro
gutter-like with two dorsal lamellae at least one toothed (fig.10). Unguis
without filamentous projection on inner teeth. Unguis apical teeth at most 3.